/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:24:06,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:24:06,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:24:06,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:24:06,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:24:06,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:24:06,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:24:06,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:24:06,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:24:06,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:24:06,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:24:06,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-10-23 18:24:06,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:24:06,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:24:06,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:24:06,344 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:24:06,391 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:24:06,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:24:06,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:24:06,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:24:06,394 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:24:06,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:24:06,395 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:24:06,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:24:06,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:24:06,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:24:06,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:24:06,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:24:06,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:24:06,397 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:24:06,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:24:06,398 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:24:06,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:24:06,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:24:06,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:24:06,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:24:06,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:24:06,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:24:06,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:24:06,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:24:06,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:24:06,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:24:06,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:24:06,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:24:06,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:24:06,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:24:06,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:24:06,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:24:06,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:24:06,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:24:06,865 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:24:06,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-10-23 18:24:06,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/081f51a97/aed96902a4c34125a68e77a1e334afbe/FLAG1c280dacd [2020-10-23 18:24:07,541 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:24:07,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_9.c [2020-10-23 18:24:07,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/081f51a97/aed96902a4c34125a68e77a1e334afbe/FLAG1c280dacd [2020-10-23 18:24:07,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/081f51a97/aed96902a4c34125a68e77a1e334afbe [2020-10-23 18:24:07,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:24:07,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:24:07,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:24:07,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:24:07,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:24:07,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:24:07" (1/1) ... [2020-10-23 18:24:07,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be471ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:07, skipping insertion in model container [2020-10-23 18:24:07,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:24:07" (1/1) ... [2020-10-23 18:24:07,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:24:08,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:24:08,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:24:08,281 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:24:08,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:24:08,367 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:24:08,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:08 WrapperNode [2020-10-23 18:24:08,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:24:08,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:24:08,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:24:08,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:24:08,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:08" (1/1) ... [2020-10-23 18:24:08,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:08" (1/1) ... [2020-10-23 18:24:08,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:08" (1/1) ... [2020-10-23 18:24:08,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:08" (1/1) ... [2020-10-23 18:24:08,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:08" (1/1) ... [2020-10-23 18:24:08,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:08" (1/1) ... [2020-10-23 18:24:08,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:08" (1/1) ... [2020-10-23 18:24:08,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:24:08,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:24:08,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:24:08,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:24:08,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:24:08,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:24:08,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:24:08,517 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:24:08,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:24:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:24:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:24:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:24:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:24:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:24:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:24:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:24:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:24:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:24:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:24:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:24:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:24:09,110 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:24:09,110 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:24:09,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:24:09 BoogieIcfgContainer [2020-10-23 18:24:09,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:24:09,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:24:09,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:24:09,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:24:09,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:24:07" (1/3) ... [2020-10-23 18:24:09,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495f3ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:24:09, skipping insertion in model container [2020-10-23 18:24:09,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:08" (2/3) ... [2020-10-23 18:24:09,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495f3ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:24:09, skipping insertion in model container [2020-10-23 18:24:09,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:24:09" (3/3) ... [2020-10-23 18:24:09,127 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-10-23 18:24:09,141 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:24:09,147 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:24:09,162 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:24:09,205 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:24:09,206 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:24:09,206 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:24:09,206 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:24:09,206 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:24:09,206 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:24:09,207 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:24:09,207 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:24:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-23 18:24:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:24:09,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:09,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:09,245 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:09,256 INFO L82 PathProgramCache]: Analyzing trace with hash 270724770, now seen corresponding path program 1 times [2020-10-23 18:24:09,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:09,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209595946] [2020-10-23 18:24:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:09,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:09,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209595946] [2020-10-23 18:24:09,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:09,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:09,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017387537] [2020-10-23 18:24:09,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:09,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:09,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:09,656 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2020-10-23 18:24:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:09,951 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2020-10-23 18:24:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:09,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:24:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:09,965 INFO L225 Difference]: With dead ends: 86 [2020-10-23 18:24:09,966 INFO L226 Difference]: Without dead ends: 67 [2020-10-23 18:24:09,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-23 18:24:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-10-23 18:24:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 18:24:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 83 transitions. [2020-10-23 18:24:10,020 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 83 transitions. Word has length 21 [2020-10-23 18:24:10,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:10,021 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 83 transitions. [2020-10-23 18:24:10,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:10,021 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 83 transitions. [2020-10-23 18:24:10,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:24:10,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:10,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:10,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:24:10,023 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:10,024 INFO L82 PathProgramCache]: Analyzing trace with hash -316081244, now seen corresponding path program 1 times [2020-10-23 18:24:10,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:10,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044855458] [2020-10-23 18:24:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:10,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:10,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044855458] [2020-10-23 18:24:10,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:10,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:10,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064390303] [2020-10-23 18:24:10,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:10,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:10,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:10,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:10,215 INFO L87 Difference]: Start difference. First operand 48 states and 83 transitions. Second operand 4 states. [2020-10-23 18:24:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:10,493 INFO L93 Difference]: Finished difference Result 109 states and 195 transitions. [2020-10-23 18:24:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:10,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:24:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:10,496 INFO L225 Difference]: With dead ends: 109 [2020-10-23 18:24:10,496 INFO L226 Difference]: Without dead ends: 67 [2020-10-23 18:24:10,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-23 18:24:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-23 18:24:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 18:24:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 115 transitions. [2020-10-23 18:24:10,510 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 115 transitions. Word has length 21 [2020-10-23 18:24:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:10,511 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 115 transitions. [2020-10-23 18:24:10,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 115 transitions. [2020-10-23 18:24:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:24:10,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:10,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:10,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:24:10,513 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:10,513 INFO L82 PathProgramCache]: Analyzing trace with hash -190848284, now seen corresponding path program 1 times [2020-10-23 18:24:10,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:10,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267600232] [2020-10-23 18:24:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:10,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:10,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267600232] [2020-10-23 18:24:10,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:10,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:10,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557593091] [2020-10-23 18:24:10,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:10,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:10,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:10,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:10,591 INFO L87 Difference]: Start difference. First operand 66 states and 115 transitions. Second operand 4 states. [2020-10-23 18:24:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:10,764 INFO L93 Difference]: Finished difference Result 101 states and 174 transitions. [2020-10-23 18:24:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:10,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 18:24:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:10,766 INFO L225 Difference]: With dead ends: 101 [2020-10-23 18:24:10,767 INFO L226 Difference]: Without dead ends: 70 [2020-10-23 18:24:10,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-23 18:24:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-23 18:24:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-23 18:24:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2020-10-23 18:24:10,778 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 22 [2020-10-23 18:24:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:10,778 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2020-10-23 18:24:10,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2020-10-23 18:24:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:24:10,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:10,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:10,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:24:10,780 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:10,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:10,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1201965534, now seen corresponding path program 1 times [2020-10-23 18:24:10,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:10,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924988875] [2020-10-23 18:24:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:10,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:10,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924988875] [2020-10-23 18:24:10,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:10,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:10,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744893267] [2020-10-23 18:24:10,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:10,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:10,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:10,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:10,856 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand 4 states. [2020-10-23 18:24:11,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:11,011 INFO L93 Difference]: Finished difference Result 185 states and 326 transitions. [2020-10-23 18:24:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:11,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 18:24:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:11,014 INFO L225 Difference]: With dead ends: 185 [2020-10-23 18:24:11,014 INFO L226 Difference]: Without dead ends: 125 [2020-10-23 18:24:11,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:11,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-23 18:24:11,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-23 18:24:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-23 18:24:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 214 transitions. [2020-10-23 18:24:11,029 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 214 transitions. Word has length 22 [2020-10-23 18:24:11,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:11,030 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 214 transitions. [2020-10-23 18:24:11,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:11,030 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 214 transitions. [2020-10-23 18:24:11,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:24:11,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:11,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:11,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:24:11,032 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:11,033 INFO L82 PathProgramCache]: Analyzing trace with hash -615159520, now seen corresponding path program 1 times [2020-10-23 18:24:11,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:11,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737918797] [2020-10-23 18:24:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:11,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:11,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737918797] [2020-10-23 18:24:11,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:11,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:11,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680173931] [2020-10-23 18:24:11,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:11,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:11,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:11,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:11,098 INFO L87 Difference]: Start difference. First operand 124 states and 214 transitions. Second operand 4 states. [2020-10-23 18:24:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:11,269 INFO L93 Difference]: Finished difference Result 160 states and 277 transitions. [2020-10-23 18:24:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:11,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 18:24:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:11,272 INFO L225 Difference]: With dead ends: 160 [2020-10-23 18:24:11,272 INFO L226 Difference]: Without dead ends: 157 [2020-10-23 18:24:11,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-23 18:24:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 124. [2020-10-23 18:24:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-23 18:24:11,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 212 transitions. [2020-10-23 18:24:11,300 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 212 transitions. Word has length 22 [2020-10-23 18:24:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:11,302 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 212 transitions. [2020-10-23 18:24:11,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 212 transitions. [2020-10-23 18:24:11,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:24:11,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:11,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:11,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:24:11,306 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:11,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:11,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1400403119, now seen corresponding path program 1 times [2020-10-23 18:24:11,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:11,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882707404] [2020-10-23 18:24:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:11,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:11,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882707404] [2020-10-23 18:24:11,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:11,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:11,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728594081] [2020-10-23 18:24:11,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:11,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:11,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:11,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:11,436 INFO L87 Difference]: Start difference. First operand 124 states and 212 transitions. Second operand 4 states. [2020-10-23 18:24:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:11,596 INFO L93 Difference]: Finished difference Result 228 states and 397 transitions. [2020-10-23 18:24:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:11,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:24:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:11,598 INFO L225 Difference]: With dead ends: 228 [2020-10-23 18:24:11,599 INFO L226 Difference]: Without dead ends: 225 [2020-10-23 18:24:11,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:11,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-23 18:24:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2020-10-23 18:24:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-23 18:24:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 286 transitions. [2020-10-23 18:24:11,613 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 286 transitions. Word has length 23 [2020-10-23 18:24:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:11,613 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 286 transitions. [2020-10-23 18:24:11,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 286 transitions. [2020-10-23 18:24:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:24:11,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:11,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:11,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:24:11,616 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash 813597105, now seen corresponding path program 1 times [2020-10-23 18:24:11,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:11,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393241933] [2020-10-23 18:24:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:11,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:11,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393241933] [2020-10-23 18:24:11,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:11,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:11,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944099541] [2020-10-23 18:24:11,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:11,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:11,692 INFO L87 Difference]: Start difference. First operand 168 states and 286 transitions. Second operand 4 states. [2020-10-23 18:24:11,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:11,891 INFO L93 Difference]: Finished difference Result 392 states and 677 transitions. [2020-10-23 18:24:11,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:11,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:24:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:11,893 INFO L225 Difference]: With dead ends: 392 [2020-10-23 18:24:11,894 INFO L226 Difference]: Without dead ends: 233 [2020-10-23 18:24:11,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-23 18:24:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-23 18:24:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-23 18:24:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 392 transitions. [2020-10-23 18:24:11,914 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 392 transitions. Word has length 23 [2020-10-23 18:24:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:11,915 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 392 transitions. [2020-10-23 18:24:11,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 392 transitions. [2020-10-23 18:24:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:24:11,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:11,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:11,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:24:11,917 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:11,918 INFO L82 PathProgramCache]: Analyzing trace with hash 469463309, now seen corresponding path program 1 times [2020-10-23 18:24:11,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:11,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827827896] [2020-10-23 18:24:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:11,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:11,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827827896] [2020-10-23 18:24:11,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:11,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:11,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337070258] [2020-10-23 18:24:11,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:11,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:11,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:11,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:11,983 INFO L87 Difference]: Start difference. First operand 232 states and 392 transitions. Second operand 4 states. [2020-10-23 18:24:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:12,187 INFO L93 Difference]: Finished difference Result 350 states and 591 transitions. [2020-10-23 18:24:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:12,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:24:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:12,189 INFO L225 Difference]: With dead ends: 350 [2020-10-23 18:24:12,189 INFO L226 Difference]: Without dead ends: 239 [2020-10-23 18:24:12,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-23 18:24:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-10-23 18:24:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-23 18:24:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 396 transitions. [2020-10-23 18:24:12,204 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 396 transitions. Word has length 24 [2020-10-23 18:24:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:12,205 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 396 transitions. [2020-10-23 18:24:12,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 396 transitions. [2020-10-23 18:24:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:24:12,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:12,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:12,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:24:12,208 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash -541653941, now seen corresponding path program 1 times [2020-10-23 18:24:12,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:12,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574867464] [2020-10-23 18:24:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:12,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:12,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574867464] [2020-10-23 18:24:12,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:12,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:12,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772713687] [2020-10-23 18:24:12,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:12,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:12,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:12,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:12,290 INFO L87 Difference]: Start difference. First operand 238 states and 396 transitions. Second operand 4 states. [2020-10-23 18:24:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:12,453 INFO L93 Difference]: Finished difference Result 430 states and 727 transitions. [2020-10-23 18:24:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:12,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:24:12,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:12,456 INFO L225 Difference]: With dead ends: 430 [2020-10-23 18:24:12,456 INFO L226 Difference]: Without dead ends: 427 [2020-10-23 18:24:12,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-23 18:24:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 330. [2020-10-23 18:24:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-23 18:24:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 540 transitions. [2020-10-23 18:24:12,472 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 540 transitions. Word has length 24 [2020-10-23 18:24:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:12,473 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 540 transitions. [2020-10-23 18:24:12,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 540 transitions. [2020-10-23 18:24:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:24:12,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:12,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:12,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 18:24:12,476 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:12,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:12,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1128459955, now seen corresponding path program 1 times [2020-10-23 18:24:12,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:12,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420940336] [2020-10-23 18:24:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:12,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:12,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420940336] [2020-10-23 18:24:12,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:12,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:12,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865605848] [2020-10-23 18:24:12,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:12,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:12,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:12,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:12,539 INFO L87 Difference]: Start difference. First operand 330 states and 540 transitions. Second operand 4 states. [2020-10-23 18:24:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:12,695 INFO L93 Difference]: Finished difference Result 766 states and 1263 transitions. [2020-10-23 18:24:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:12,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:24:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:12,698 INFO L225 Difference]: With dead ends: 766 [2020-10-23 18:24:12,699 INFO L226 Difference]: Without dead ends: 451 [2020-10-23 18:24:12,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-23 18:24:12,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 450. [2020-10-23 18:24:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-23 18:24:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 728 transitions. [2020-10-23 18:24:12,721 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 728 transitions. Word has length 24 [2020-10-23 18:24:12,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:12,721 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 728 transitions. [2020-10-23 18:24:12,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:12,721 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 728 transitions. [2020-10-23 18:24:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:24:12,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:12,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:12,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:24:12,724 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:12,725 INFO L82 PathProgramCache]: Analyzing trace with hash 395247164, now seen corresponding path program 1 times [2020-10-23 18:24:12,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:12,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754760451] [2020-10-23 18:24:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:12,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:12,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754760451] [2020-10-23 18:24:12,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:12,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:12,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679662911] [2020-10-23 18:24:12,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:12,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:12,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:12,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:12,784 INFO L87 Difference]: Start difference. First operand 450 states and 728 transitions. Second operand 4 states. [2020-10-23 18:24:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:12,984 INFO L93 Difference]: Finished difference Result 674 states and 1087 transitions. [2020-10-23 18:24:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:12,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:24:12,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:12,987 INFO L225 Difference]: With dead ends: 674 [2020-10-23 18:24:12,988 INFO L226 Difference]: Without dead ends: 459 [2020-10-23 18:24:12,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-23 18:24:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 458. [2020-10-23 18:24:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-23 18:24:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 728 transitions. [2020-10-23 18:24:13,010 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 728 transitions. Word has length 25 [2020-10-23 18:24:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:13,010 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 728 transitions. [2020-10-23 18:24:13,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 728 transitions. [2020-10-23 18:24:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:24:13,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:13,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:13,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 18:24:13,012 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash -615870086, now seen corresponding path program 1 times [2020-10-23 18:24:13,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:13,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050226661] [2020-10-23 18:24:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:13,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:13,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050226661] [2020-10-23 18:24:13,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:13,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:13,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979630245] [2020-10-23 18:24:13,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:13,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:13,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:13,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:13,071 INFO L87 Difference]: Start difference. First operand 458 states and 728 transitions. Second operand 4 states. [2020-10-23 18:24:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:13,279 INFO L93 Difference]: Finished difference Result 814 states and 1315 transitions. [2020-10-23 18:24:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:13,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:24:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:13,285 INFO L225 Difference]: With dead ends: 814 [2020-10-23 18:24:13,285 INFO L226 Difference]: Without dead ends: 811 [2020-10-23 18:24:13,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-10-23 18:24:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 650. [2020-10-23 18:24:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-10-23 18:24:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1008 transitions. [2020-10-23 18:24:13,323 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1008 transitions. Word has length 25 [2020-10-23 18:24:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:13,324 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 1008 transitions. [2020-10-23 18:24:13,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1008 transitions. [2020-10-23 18:24:13,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:24:13,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:13,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:13,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 18:24:13,327 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:13,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1202676100, now seen corresponding path program 1 times [2020-10-23 18:24:13,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:13,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467755358] [2020-10-23 18:24:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:13,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:13,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467755358] [2020-10-23 18:24:13,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:13,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:13,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492331922] [2020-10-23 18:24:13,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:13,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:13,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:13,427 INFO L87 Difference]: Start difference. First operand 650 states and 1008 transitions. Second operand 4 states. [2020-10-23 18:24:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:13,599 INFO L93 Difference]: Finished difference Result 1502 states and 2339 transitions. [2020-10-23 18:24:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:13,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:24:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:13,605 INFO L225 Difference]: With dead ends: 1502 [2020-10-23 18:24:13,605 INFO L226 Difference]: Without dead ends: 875 [2020-10-23 18:24:13,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2020-10-23 18:24:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 874. [2020-10-23 18:24:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-23 18:24:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1336 transitions. [2020-10-23 18:24:13,643 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1336 transitions. Word has length 25 [2020-10-23 18:24:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:13,643 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 1336 transitions. [2020-10-23 18:24:13,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1336 transitions. [2020-10-23 18:24:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:24:13,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:13,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:13,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 18:24:13,646 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:13,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1905442760, now seen corresponding path program 1 times [2020-10-23 18:24:13,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:13,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823860672] [2020-10-23 18:24:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:13,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:13,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823860672] [2020-10-23 18:24:13,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:13,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:13,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325142870] [2020-10-23 18:24:13,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:13,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:13,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:13,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:13,728 INFO L87 Difference]: Start difference. First operand 874 states and 1336 transitions. Second operand 4 states. [2020-10-23 18:24:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:13,903 INFO L93 Difference]: Finished difference Result 1310 states and 1995 transitions. [2020-10-23 18:24:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:13,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:24:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:13,908 INFO L225 Difference]: With dead ends: 1310 [2020-10-23 18:24:13,908 INFO L226 Difference]: Without dead ends: 891 [2020-10-23 18:24:13,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-10-23 18:24:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 890. [2020-10-23 18:24:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-10-23 18:24:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1336 transitions. [2020-10-23 18:24:13,945 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1336 transitions. Word has length 26 [2020-10-23 18:24:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:13,945 INFO L481 AbstractCegarLoop]: Abstraction has 890 states and 1336 transitions. [2020-10-23 18:24:13,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1336 transitions. [2020-10-23 18:24:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:24:13,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:13,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:13,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 18:24:13,948 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:13,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1378407286, now seen corresponding path program 1 times [2020-10-23 18:24:13,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:13,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688565885] [2020-10-23 18:24:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:14,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:14,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688565885] [2020-10-23 18:24:14,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:14,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:14,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024394673] [2020-10-23 18:24:14,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:14,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:14,021 INFO L87 Difference]: Start difference. First operand 890 states and 1336 transitions. Second operand 4 states. [2020-10-23 18:24:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:14,205 INFO L93 Difference]: Finished difference Result 1550 states and 2363 transitions. [2020-10-23 18:24:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:14,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:24:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:14,214 INFO L225 Difference]: With dead ends: 1550 [2020-10-23 18:24:14,214 INFO L226 Difference]: Without dead ends: 1547 [2020-10-23 18:24:14,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:14,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-10-23 18:24:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1290. [2020-10-23 18:24:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1290 states. [2020-10-23 18:24:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1880 transitions. [2020-10-23 18:24:14,276 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1880 transitions. Word has length 26 [2020-10-23 18:24:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:14,277 INFO L481 AbstractCegarLoop]: Abstraction has 1290 states and 1880 transitions. [2020-10-23 18:24:14,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1880 transitions. [2020-10-23 18:24:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:24:14,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:14,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:14,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 18:24:14,281 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:14,282 INFO L82 PathProgramCache]: Analyzing trace with hash 791601272, now seen corresponding path program 1 times [2020-10-23 18:24:14,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:14,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40861793] [2020-10-23 18:24:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:14,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:14,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40861793] [2020-10-23 18:24:14,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:14,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:14,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637898986] [2020-10-23 18:24:14,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:14,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:14,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:14,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:14,367 INFO L87 Difference]: Start difference. First operand 1290 states and 1880 transitions. Second operand 4 states. [2020-10-23 18:24:14,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:14,628 INFO L93 Difference]: Finished difference Result 2958 states and 4315 transitions. [2020-10-23 18:24:14,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:14,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:24:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:14,637 INFO L225 Difference]: With dead ends: 2958 [2020-10-23 18:24:14,638 INFO L226 Difference]: Without dead ends: 1707 [2020-10-23 18:24:14,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-10-23 18:24:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1706. [2020-10-23 18:24:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2020-10-23 18:24:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2440 transitions. [2020-10-23 18:24:14,727 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2440 transitions. Word has length 26 [2020-10-23 18:24:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:14,727 INFO L481 AbstractCegarLoop]: Abstraction has 1706 states and 2440 transitions. [2020-10-23 18:24:14,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2440 transitions. [2020-10-23 18:24:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:24:14,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:14,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:14,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 18:24:14,732 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash -212375801, now seen corresponding path program 1 times [2020-10-23 18:24:14,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:14,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154734771] [2020-10-23 18:24:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:14,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:14,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154734771] [2020-10-23 18:24:14,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:14,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:14,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436446413] [2020-10-23 18:24:14,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:14,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:14,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:14,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:14,809 INFO L87 Difference]: Start difference. First operand 1706 states and 2440 transitions. Second operand 4 states. [2020-10-23 18:24:15,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:15,018 INFO L93 Difference]: Finished difference Result 2558 states and 3643 transitions. [2020-10-23 18:24:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:15,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:24:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:15,028 INFO L225 Difference]: With dead ends: 2558 [2020-10-23 18:24:15,029 INFO L226 Difference]: Without dead ends: 1739 [2020-10-23 18:24:15,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2020-10-23 18:24:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1738. [2020-10-23 18:24:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2020-10-23 18:24:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2440 transitions. [2020-10-23 18:24:15,110 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2440 transitions. Word has length 27 [2020-10-23 18:24:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:15,111 INFO L481 AbstractCegarLoop]: Abstraction has 1738 states and 2440 transitions. [2020-10-23 18:24:15,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2440 transitions. [2020-10-23 18:24:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:24:15,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:15,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:15,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 18:24:15,115 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1223493051, now seen corresponding path program 1 times [2020-10-23 18:24:15,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:15,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228758232] [2020-10-23 18:24:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:15,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:15,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228758232] [2020-10-23 18:24:15,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:15,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:15,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494985063] [2020-10-23 18:24:15,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:15,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:15,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:15,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:15,202 INFO L87 Difference]: Start difference. First operand 1738 states and 2440 transitions. Second operand 4 states. [2020-10-23 18:24:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:15,433 INFO L93 Difference]: Finished difference Result 2958 states and 4203 transitions. [2020-10-23 18:24:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:15,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:24:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:15,448 INFO L225 Difference]: With dead ends: 2958 [2020-10-23 18:24:15,448 INFO L226 Difference]: Without dead ends: 2955 [2020-10-23 18:24:15,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-10-23 18:24:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2570. [2020-10-23 18:24:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2570 states. [2020-10-23 18:24:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 3496 transitions. [2020-10-23 18:24:15,543 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 3496 transitions. Word has length 27 [2020-10-23 18:24:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:15,544 INFO L481 AbstractCegarLoop]: Abstraction has 2570 states and 3496 transitions. [2020-10-23 18:24:15,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 3496 transitions. [2020-10-23 18:24:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:24:15,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:15,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:15,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 18:24:15,549 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:15,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1810299065, now seen corresponding path program 1 times [2020-10-23 18:24:15,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:15,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989214787] [2020-10-23 18:24:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:15,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:15,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989214787] [2020-10-23 18:24:15,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:15,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:15,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233508530] [2020-10-23 18:24:15,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:15,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:15,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:15,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:15,609 INFO L87 Difference]: Start difference. First operand 2570 states and 3496 transitions. Second operand 4 states. [2020-10-23 18:24:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:15,841 INFO L93 Difference]: Finished difference Result 5838 states and 7915 transitions. [2020-10-23 18:24:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:15,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:24:15,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:15,858 INFO L225 Difference]: With dead ends: 5838 [2020-10-23 18:24:15,858 INFO L226 Difference]: Without dead ends: 3339 [2020-10-23 18:24:15,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2020-10-23 18:24:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3338. [2020-10-23 18:24:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-10-23 18:24:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4424 transitions. [2020-10-23 18:24:16,019 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4424 transitions. Word has length 27 [2020-10-23 18:24:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:16,019 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 4424 transitions. [2020-10-23 18:24:16,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4424 transitions. [2020-10-23 18:24:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:24:16,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:16,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:16,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 18:24:16,025 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:16,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:16,026 INFO L82 PathProgramCache]: Analyzing trace with hash 733102947, now seen corresponding path program 1 times [2020-10-23 18:24:16,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:16,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604766444] [2020-10-23 18:24:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:16,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:16,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604766444] [2020-10-23 18:24:16,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:16,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:16,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697032152] [2020-10-23 18:24:16,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:16,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:16,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:16,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:16,095 INFO L87 Difference]: Start difference. First operand 3338 states and 4424 transitions. Second operand 4 states. [2020-10-23 18:24:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:16,300 INFO L93 Difference]: Finished difference Result 5006 states and 6603 transitions. [2020-10-23 18:24:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:16,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-23 18:24:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:16,316 INFO L225 Difference]: With dead ends: 5006 [2020-10-23 18:24:16,316 INFO L226 Difference]: Without dead ends: 3403 [2020-10-23 18:24:16,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2020-10-23 18:24:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3402. [2020-10-23 18:24:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3402 states. [2020-10-23 18:24:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4424 transitions. [2020-10-23 18:24:16,482 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4424 transitions. Word has length 28 [2020-10-23 18:24:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:16,482 INFO L481 AbstractCegarLoop]: Abstraction has 3402 states and 4424 transitions. [2020-10-23 18:24:16,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4424 transitions. [2020-10-23 18:24:16,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:24:16,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:16,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:16,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 18:24:16,488 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:16,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:16,489 INFO L82 PathProgramCache]: Analyzing trace with hash -278014303, now seen corresponding path program 1 times [2020-10-23 18:24:16,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:16,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973161698] [2020-10-23 18:24:16,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:16,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:16,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973161698] [2020-10-23 18:24:16,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:16,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:16,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803832750] [2020-10-23 18:24:16,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:16,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:16,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:16,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:16,566 INFO L87 Difference]: Start difference. First operand 3402 states and 4424 transitions. Second operand 4 states. [2020-10-23 18:24:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:16,824 INFO L93 Difference]: Finished difference Result 5646 states and 7371 transitions. [2020-10-23 18:24:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:16,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-23 18:24:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:16,873 INFO L225 Difference]: With dead ends: 5646 [2020-10-23 18:24:16,873 INFO L226 Difference]: Without dead ends: 5643 [2020-10-23 18:24:16,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2020-10-23 18:24:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5130. [2020-10-23 18:24:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5130 states. [2020-10-23 18:24:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 6472 transitions. [2020-10-23 18:24:17,094 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 6472 transitions. Word has length 28 [2020-10-23 18:24:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:17,095 INFO L481 AbstractCegarLoop]: Abstraction has 5130 states and 6472 transitions. [2020-10-23 18:24:17,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 6472 transitions. [2020-10-23 18:24:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:24:17,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:17,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:17,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 18:24:17,105 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:17,106 INFO L82 PathProgramCache]: Analyzing trace with hash -864820317, now seen corresponding path program 1 times [2020-10-23 18:24:17,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:17,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89889704] [2020-10-23 18:24:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:17,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:17,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89889704] [2020-10-23 18:24:17,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:17,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697730518] [2020-10-23 18:24:17,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:17,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:17,175 INFO L87 Difference]: Start difference. First operand 5130 states and 6472 transitions. Second operand 4 states. [2020-10-23 18:24:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:17,459 INFO L93 Difference]: Finished difference Result 11534 states and 14411 transitions. [2020-10-23 18:24:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:17,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-23 18:24:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:17,474 INFO L225 Difference]: With dead ends: 11534 [2020-10-23 18:24:17,475 INFO L226 Difference]: Without dead ends: 6539 [2020-10-23 18:24:17,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2020-10-23 18:24:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6538. [2020-10-23 18:24:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6538 states. [2020-10-23 18:24:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6538 states to 6538 states and 7944 transitions. [2020-10-23 18:24:17,754 INFO L78 Accepts]: Start accepts. Automaton has 6538 states and 7944 transitions. Word has length 28 [2020-10-23 18:24:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:17,754 INFO L481 AbstractCegarLoop]: Abstraction has 6538 states and 7944 transitions. [2020-10-23 18:24:17,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6538 states and 7944 transitions. [2020-10-23 18:24:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:24:17,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:17,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:17,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 18:24:17,764 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:17,765 INFO L82 PathProgramCache]: Analyzing trace with hash -21816366, now seen corresponding path program 1 times [2020-10-23 18:24:17,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:17,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560251529] [2020-10-23 18:24:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:17,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:17,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560251529] [2020-10-23 18:24:17,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:17,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:17,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620786302] [2020-10-23 18:24:17,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:17,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:17,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:17,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:17,817 INFO L87 Difference]: Start difference. First operand 6538 states and 7944 transitions. Second operand 4 states. [2020-10-23 18:24:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:18,093 INFO L93 Difference]: Finished difference Result 9806 states and 11851 transitions. [2020-10-23 18:24:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:18,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:24:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:18,108 INFO L225 Difference]: With dead ends: 9806 [2020-10-23 18:24:18,108 INFO L226 Difference]: Without dead ends: 6667 [2020-10-23 18:24:18,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2020-10-23 18:24:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6666. [2020-10-23 18:24:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-10-23 18:24:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 7944 transitions. [2020-10-23 18:24:18,377 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 7944 transitions. Word has length 29 [2020-10-23 18:24:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:18,377 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 7944 transitions. [2020-10-23 18:24:18,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 7944 transitions. [2020-10-23 18:24:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:24:18,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:18,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:18,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 18:24:18,388 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:18,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1032933616, now seen corresponding path program 1 times [2020-10-23 18:24:18,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:18,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988233492] [2020-10-23 18:24:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:18,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:18,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988233492] [2020-10-23 18:24:18,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:18,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:18,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372829555] [2020-10-23 18:24:18,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:18,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:18,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:18,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:18,439 INFO L87 Difference]: Start difference. First operand 6666 states and 7944 transitions. Second operand 4 states. [2020-10-23 18:24:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:18,856 INFO L93 Difference]: Finished difference Result 10765 states and 12682 transitions. [2020-10-23 18:24:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:18,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:24:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:18,878 INFO L225 Difference]: With dead ends: 10765 [2020-10-23 18:24:18,879 INFO L226 Difference]: Without dead ends: 10762 [2020-10-23 18:24:18,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2020-10-23 18:24:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 10250. [2020-10-23 18:24:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10250 states. [2020-10-23 18:24:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10250 states to 10250 states and 11912 transitions. [2020-10-23 18:24:19,228 INFO L78 Accepts]: Start accepts. Automaton has 10250 states and 11912 transitions. Word has length 29 [2020-10-23 18:24:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:19,228 INFO L481 AbstractCegarLoop]: Abstraction has 10250 states and 11912 transitions. [2020-10-23 18:24:19,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 10250 states and 11912 transitions. [2020-10-23 18:24:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:24:19,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:19,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:19,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 18:24:19,249 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:19,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1619739630, now seen corresponding path program 1 times [2020-10-23 18:24:19,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:19,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737292029] [2020-10-23 18:24:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:19,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:19,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737292029] [2020-10-23 18:24:19,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:19,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:19,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797519063] [2020-10-23 18:24:19,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:19,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:19,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:19,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:19,309 INFO L87 Difference]: Start difference. First operand 10250 states and 11912 transitions. Second operand 4 states. [2020-10-23 18:24:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:19,780 INFO L93 Difference]: Finished difference Result 22794 states and 25992 transitions. [2020-10-23 18:24:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:19,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:24:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:19,781 INFO L225 Difference]: With dead ends: 22794 [2020-10-23 18:24:19,781 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:24:19,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:24:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:24:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:24:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:24:19,819 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-23 18:24:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:19,819 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:24:19,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:24:19,820 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:24:19,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 18:24:19,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:24:36,675 WARN L193 SmtUtils]: Spent 16.83 s on a formula simplification. DAG size of input: 2122 DAG size of output: 32 [2020-10-23 18:24:36,739 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:24:36,739 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:24:36,739 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:24:36,740 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:24:36,740 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:24:36,740 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:24:36,740 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:24:36,740 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:24:36,740 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:24:36,740 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:24:36,741 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:24:36,741 INFO L274 CegarLoopResult]: For program point L126-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,741 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 151) no Hoare annotation was computed. [2020-10-23 18:24:36,741 INFO L274 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-10-23 18:24:36,741 INFO L274 CegarLoopResult]: For program point L127(line 127) no Hoare annotation was computed. [2020-10-23 18:24:36,741 INFO L274 CegarLoopResult]: For program point L111-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,741 INFO L274 CegarLoopResult]: For program point L136-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,741 INFO L274 CegarLoopResult]: For program point L95-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,741 INFO L274 CegarLoopResult]: For program point L87-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,742 INFO L274 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-10-23 18:24:36,742 INFO L274 CegarLoopResult]: For program point L79-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,742 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 151) no Hoare annotation was computed. [2020-10-23 18:24:36,742 INFO L274 CegarLoopResult]: For program point L137(line 137) no Hoare annotation was computed. [2020-10-23 18:24:36,742 INFO L274 CegarLoopResult]: For program point L71-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,742 INFO L274 CegarLoopResult]: For program point L63(lines 63 65) no Hoare annotation was computed. [2020-10-23 18:24:36,742 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 151) the Hoare annotation is: true [2020-10-23 18:24:36,742 INFO L274 CegarLoopResult]: For program point L63-2(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,743 INFO L274 CegarLoopResult]: For program point L121-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,743 INFO L274 CegarLoopResult]: For program point L122(line 122) no Hoare annotation was computed. [2020-10-23 18:24:36,743 INFO L277 CegarLoopResult]: At program point L147(lines 7 151) the Hoare annotation is: true [2020-10-23 18:24:36,743 INFO L274 CegarLoopResult]: For program point L106-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,743 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-10-23 18:24:36,743 INFO L274 CegarLoopResult]: For program point L131-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,743 INFO L274 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-10-23 18:24:36,743 INFO L274 CegarLoopResult]: For program point L132(line 132) no Hoare annotation was computed. [2020-10-23 18:24:36,744 INFO L274 CegarLoopResult]: For program point L91-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,744 INFO L274 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-10-23 18:24:36,744 INFO L274 CegarLoopResult]: For program point L116-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,744 INFO L274 CegarLoopResult]: For program point L83-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,744 INFO L277 CegarLoopResult]: At program point L141-1(lines 38 146) the Hoare annotation is: true [2020-10-23 18:24:36,744 INFO L274 CegarLoopResult]: For program point L75-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,744 INFO L274 CegarLoopResult]: For program point L67-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,744 INFO L274 CegarLoopResult]: For program point L117(line 117) no Hoare annotation was computed. [2020-10-23 18:24:36,745 INFO L274 CegarLoopResult]: For program point L142(line 142) no Hoare annotation was computed. [2020-10-23 18:24:36,745 INFO L270 CegarLoopResult]: At program point L142-1(lines 7 151) the Hoare annotation is: false [2020-10-23 18:24:36,745 INFO L274 CegarLoopResult]: For program point L101-1(lines 38 146) no Hoare annotation was computed. [2020-10-23 18:24:36,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:24:36 BoogieIcfgContainer [2020-10-23 18:24:36,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:24:36,759 INFO L168 Benchmark]: Toolchain (without parser) took 28810.28 ms. Allocated memory was 151.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 126.8 MB in the beginning and 1.0 GB in the end (delta: -878.9 MB). Peak memory consumption was 787.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:36,759 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:24:36,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.39 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:36,760 INFO L168 Benchmark]: Boogie Preprocessor took 47.65 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:36,761 INFO L168 Benchmark]: RCFGBuilder took 694.94 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 128.7 MB in the end (delta: -14.3 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:36,761 INFO L168 Benchmark]: TraceAbstraction took 27639.68 ms. Allocated memory was 151.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 128.2 MB in the beginning and 1.0 GB in the end (delta: -877.5 MB). Peak memory consumption was 787.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:36,764 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 409.39 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.65 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 694.94 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 128.7 MB in the end (delta: -14.3 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 27639.68 ms. Allocated memory was 151.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 128.2 MB in the beginning and 1.0 GB in the end (delta: -877.5 MB). Peak memory consumption was 787.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.6s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 16.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1967 SDtfs, 2829 SDslu, 194 SDs, 0 SdLazy, 1415 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10250occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.0s AutomataMinimizationTime, 25 MinimizatonAttempts, 2049 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 32 PreInvPairs, 547 NumberOfFragments, 38 HoareAnnotationTreeSize, 32 FomulaSimplifications, 13725542 FormulaSimplificationTreeSizeReduction, 16.8s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 631 NumberOfCodeBlocks, 631 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 606 ConstructedInterpolants, 0 QuantifiedInterpolants, 45934 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...